audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Brake Light Switch|Adjustments > < All Other Service Bulletins for Brake Light Switch:|370819|Page 8287
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Connector Contact

Measure against

1

Body Ground

-

The LED should light up.

Connector Contact

Measure against

2

Body Ground

-

Switch on ignition.
-

The LED should light up.

If the LED does not light up:

-

Test for open circuit or short to Ground in wiring from contact 1 and/or contact 2 of connector:

-

Correct short circuit or open circuit if necessary.

If the LED lights up:

-

Test activation.

Checking activation

-

Connect test box VAG 1598/31 to wiring harness for engine control module. Do not connect to the engine control module itself.  

-

Test for open circuit and short to positive or Ground in the following wiring connections:

Connector Contact

Test box VAG1598/31 Socket

3

55

4

56

-

Correct short circuit or open circuit if necessary.

Brake Light Switch|Adjustments > < All Other Service Bulletins for Brake Light Switch:|370819|Page 8287